[installation fail] representable 3.1.0 requires Ruby >= 2.4.0

[hiroyuki-sato]

Due to requiring Ruby 2.4 in representable gem
embulk gem install embulk-outputt-bigquery` fail in some situations.

Same as #113

google-api-client depends on representable gem.
representable gem 3.1.0 requires Ruby >= 2.4.0
Embulk 0.9 use JRuby 9.1.X.Y and It compatible Ruby 2.3.
representable in rubygems.

Reported-by: @nacodon

embulk gem install embulk-output-bigquery
2021-04-12 19:37:52.789 +0900: Embulk v0.9.23

Gem plugin path is: /Users/user/.embulk/lib/gems

Fetching: multipart-post-2.1.1.gem (100%)
Successfully installed multipart-post-2.1.1
Fetching: faraday-0.17.4.gem (100%)
Successfully installed faraday-0.17.4
Fetching: multi_json-1.15.0.gem (100%)
Successfully installed multi_json-1.15.0
Fetching: jwt-2.2.2.gem (100%)
Successfully installed jwt-2.2.2
Fetching: public_suffix-4.0.6.gem (100%)
Successfully installed public_suffix-4.0.6
Fetching: addressable-2.7.0.gem (100%)
Successfully installed addressable-2.7.0
Fetching: signet-0.11.0.gem (100%)
Successfully installed signet-0.11.0
Fetching: uber-0.1.0.gem (100%)
Successfully installed uber-0.1.0
Fetching: declarative-0.0.20.gem (100%)
Successfully installed declarative-0.0.20
Fetching: trailblazer-option-0.1.0.gem (100%)
Successfully installed trailblazer-option-0.1.0
Fetching: representable-3.1.0.gem (100%)
ERROR:  Error installing embulk-output-bigquery:
	representable requires Ruby version >= 2.4.0.

Workaround

embulk gem install representable -v 3.0.4
embulk gem install embulk-output-bigquery

[tanabee]

It seems necessary to specify the version of the faraday package.
https://rubygems.org/gems/faraday

embulk gem install faraday -v 0.17.4

[hiroyuki-sato]

Hello, @tanabee. I already fixed this by #134.(But, new version not yet released).

[hiroyuki-sato]

#130 fixed this issue.

[tanabee]

@hiroyuki-sato Thanks! I'm looking forward the release.